I am a machinist in a Q/A lab...we actually machine our parts before we can test them, and I never thought of checking up on the tolerances. But I never had a problem. I just spun my A/C/C' s to check my broadheads and they were absolutely perfect. I will keep your post in mind, 8wgt, in case any of my friends have problems with their inserts. Thanks for the idea.[8D]